| 摘要 |
PROBLEM TO BE SOLVED: To provide extruded profiles with a screw hole in which cutting chips in the case of the screwing of a screw can be discharged easily and the deformation of a screw hole section can be prevented by stress by chips. SOLUTION: A screw hole section 2 in which the screw hole is formed on an inner circumferential surface is molded integrally to the extruded profiles 1. Base-end side recessed sections 10 are formed at least two places of the inner circumferential surface of the screw hole in a base-end side region 6. Size L1 from the center O of the screw hole section 2 to the bottom section of the base-end side recessed section 10 is made larger than that L2 from the center of a screw 50 screwed into the screw hole to an outer circumferential section. Since the base-end side recessed sections 10 are used as the discharge grooves of cutting chips generated at a time when the screw 50 is screwed into the screw hole section 2, the cutting chips are not held between the screw 50 and the screw hole, and stress by the cutting chips is applied and the deformation of the screw hole section 2 can be prevented.
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